Siemens SCALANCE X-300 Configuration Manual page 62

Configuration using Web Based Management and Command Line Interface
4.3 The X-300/X-400 menu
Redundancy Function
The "Redundancy Function" column shows the role of the device within the ring:
● No Ring Redundancy (off)
The IE switch is operating without redundancy function.
● HRP Client (HRP-Clt)
The IE switch is operating as an HRP client.
● HRP Manager (HRP-Mgr)
The IE switch is operating as an HRP manager.
● MRP Client (MRP-Clt)
The IE switch is operating as an MRP client.
● MRP Manager (MRP-Mgr)
The IE switch is operating as an MRP manager.
RM Status
The "RM Status" column shows whether or not the IE switch is operating as redundancy
manager and whether it has opened or closed the ring in this role.
● Passive
The IE switch is operating as redundancy manager and has opened the ring; in other
words, the line of switches connected to the ring ports is operating problem free. The
passive status is also displayed if the IE switch is not operating as the redundancy
manager (RM function disabled).
● Active:
The IE switch is operating as redundancy manager and has closed the ring; in other
words, the line of switches connected to the ring ports is interrupted (problem). The
redundancy manager connects its ring ports through and restores an uninterrupted linear
topology.
● If media redundancy in ring topologies is completely disabled, no ring ports are displayed
and the text "Ring Redundancy disabled" is displayed.
Ring Ports
Shows the ports being used as ring ports.
Standby Function
Note
Device with the higher MAC address becomes master
When linking HRP rings redundantly, two devices are always configured as a master/slave
pair. This also applies to interrupted HRP rings = linear buses. When operating normally, the
device with the higher MAC address adopts the role of master.
This type of assignment is important in particular when a device is replaced. Depending on
the MAC addresses, the previous device with the slave function can take over the role of the
standby master.
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Configuration Manual, 10/2014, C79000-G8976-C187-22
SCALANCE X-300 / X-400